Republican senatorial candidate Chris McDaniel speaks to supporters by the red caboose on Main Street in Madison during a political rally Thursday. Rick Guy/The Clarion-Ledger Rick Guy/The Clarion-Ledger

Republican senatorial candidate Chris McDaniel speaks to supporters as his son Chamberlain, 2, runs around the podium by the red caboose on Main Street in Madison during a political rally Thursday. Rick Guy/The Clarion-Ledger Rick Guy/The Clarion-Ledger